Classification
140 - Specific philosophical schools
330 - Economics
610 - Medicine & health
10
700 - The arts; fine & decorative arts
10
600 - Technology
8
000 - Computer science, information & general works
7
333 - Economics of land & energy
7
363 - Other social problems & services
7
380 - Commerce, communications & transportation
6
620 - Engineering & allied operations
5
320 - Political science
4
370 - Education
4
576 - Genetics & evolution
4
551 - Geology, hydrology & meteorology
3
900 - History & geography
3
361 - Social problems & social welfare in general
2
500 - Natural sciences & mathematics
2
581 - Specific topics in natural history
2
630 - Agriculture & related technologies
2
100 - Philosophy & psychology
1
170 - Ethics
1
200 - Religion
1
340 - Law
1
350 - Public administration & military science
1
400 - Language
1
580 - Plants (Botany)
1
612 - Human physiology
1
658 - General management
1
720 - Architecture
1